Eamonn O'Neill Dawn Woodgate Vassilis Kostakos Easing the wait in the emergency room: building a theory of public information systems. 17-25 2004 conf/ACMdis/2004 Conference on Designing Interactive Systems http://doi.acm.org/10.1145/1013115.1013120 db/conf/ACMdis/ACMdis2004.html#ONeillWK04